Need Suggestions: Ancient Bog Cultures and Viking

At long last, I've decided I'm going to visit Denmark and will be there in December. I like travelling with a theme and for Denmark I've got two in mind: anywhere that has artefacts or describes the ancient bog cultures there and anywhere that has really interesting viking rune writing.

I think cultures that grow up around bogs and swamps are interesting and I've read a bit about the ones in Ireland. But I wondered if anyone had seen any cool stuff with these them in Denmark. I also thought it would be neat to see Viking writing. Even if it's like "Thor/Frieda wuz here" I thought it would an interesting photo essay.